Antenna device

Abstract

Provided is an antenna device capable of ensuring an installation space for components related to an antenna and eliminating a dead zone of a signal transmitted or received by the antenna by tilting an antenna unit. To this end, the antenna device according to the present invention includes a pole, an antenna unit, a lower link unit configured to couple a lower portion of the antenna unit to the pole so that the lower portion of the antenna unit is rotatable in an upward/downward direction, and a tilt drive unit configured to couple an upper portion of the antenna unit to the pole and tilt the upper portion of the antenna unit by rotating the upper portion of the antenna unit about a rotation center of the lower link unit, in which the tilt drive unit includes a tilt motor, a worm gear configured to be rotated by driving power of the tilt motor, a first tilt arm coupled to the antenna unit, a second tilt arm coupled to the pole, a first worm wheel configured to rotate the first tilt arm by being rotated by a rotation of the worm gear, and a second worm wheel configured to rotate the second tilt arm by being rotated by a rotation of the worm gear.

What is claimed is: 
     
         1 . An antenna device comprising:
 an antenna assembly;   a lower link assembly configured to couple a lower portion of the antenna assembly to a support pole so that the lower portion of the antenna assembly is rotatable around a pivot axis perpendicular to a length direction of the support pole; and   a tilt drive assembly configured to couple an upper portion of the antenna assembly to the support pole and tilt the upper portion of the antenna assembly by rotating the upper portion of the antenna assembly about the pivot axis,   wherein the tilt drive assembly comprises:   a tilt motor:   a worm gear configured to be rotated by the tilt motor; and   a first tilt arm coupled to the antenna assembly, and   wherein the tilt drive assembly further comprises:   a second tilt arm coupled to the support pole;   a first worm wheel configured to rotate the first tilt arm by being rotated by a rotation of the worm gear; and   a second worm wheel configured to rotate the second tilt arm by being rotated by a rotation of the worm gear.   
     
     
         2 . The antenna device of  claim 1 , further comprising:
 a radio assembly coupled to the antenna assembly and disposed in an internal space defined by the support pole, the antenna assembly, the lower link assembly, and the tilt drive assembly.   
     
     
         3 . An antenna device comprising:
 an antenna assembly;   a lower link assembly configured to couple a lower portion of the antenna assembly to a support pole so that the lower portion of the antenna assembly is rotatable around a pivot axis perpendicular to a length direction of the support pole; and   a tilt drive assembly configured to couple an upper portion of the antenna assembly to the support pole and tilt the upper portion of the antenna assembly by rotating the upper portion of the antenna assembly about the pivot axis,   wherein the antenna device further comprises:   an upper mounting bracket coupled to the upper portion of the antenna assembly and having first coupling portions protruding toward the support pole; and   an upper mounting clamp coupled to an upper portion of the support pole and having second coupling portions protruding toward the antenna assembly,   wherein a lower portion of the first tilt arm is rotatably coupled to the first coupling portions, and an upper portion of the first tilt arm is coupled to rotary shafts of the first worm wheel, and   wherein a lower portion of the second tilt arm is rotatably coupled to the second coupling portions, and an upper portion of the second tilt arm is coupled to rotary shafts of the second worm wheel.   
     
     
         4 . The antenna device of  claim 1 , wherein first coupling portions are provided as a pair of first coupling portions spaced apart from each other in a transverse direction of the antenna assembly, and the second coupling portions are provided as a pair of second coupling portions spaced apart from each other in the transverse direction of the antenna assembly. 
     
     
         5 . The antenna device of  claim 4 , wherein the first tilt arm comprises:
 a first tilt arm main body having two opposite lower portions rotatably coupled to the pair of first coupling portions;   a first extension portion extending upward from one side upper end of the first tilt arm main body and coupled to one end of the rotary shaft of the first worm wheel; and   a second extension portion extending upward from the other side upper end of the second tilt arm main body and coupled to the other end of the rotary shaft of the first worm wheel, and   wherein the second tilt arm comprises:   a second tilt arm main body having two opposite lower portions rotatably coupled to the pair of second coupling portions;   a third extension portion extending upward from one side upper end of the second tilt arm main body and coupled to one end of the rotary shaft of the second worm wheel; and   a fourth extension portion extending upward from the other side upper end of the second tilt arm main body and coupled to the other end of the rotary shaft of the second worm wheel.   
     
     
         6 . The antenna device of  claim 4 , further comprising:
 tilt drive housings disposed between the first extension portion and the third extension portion and between the second extension portion and the fourth extension portion and configured to accommodate the tilt motor, the worm gear, the first worm wheel, and the second worm wheel therein.   
     
     
         7 . The antenna device of  claim 4 , wherein one of the first extension portion and the second extension portion is separably fastened to the first tilt arm main body, and one of the third extension portion and the fourth extension portion is separably fastened to the second tilt arm main body. 
     
     
         8 . The antenna device of  claim 6 , wherein the rotary shafts of the first worm wheel comprise:
 a first rotary shaft portion having an outer periphery to which the first worm wheel is coupled, the first rotary shaft portion having an outer end fastened to any one of the first extension portion and the second extension portion; and   a second rotary shaft portion integrated with the other of the first extension portion and the second extension portion and fastened to an inner end of the first rotary shaft portion, and   wherein the rotary shafts of the second worm wheel comprise:   a third rotary shaft portion having an outer periphery to which the second worm wheel is coupled, the third rotary shaft portion having an outer end fastened to any one of the third extension portion and the fourth extension portion; and   a fourth rotary shaft portion integrated with the other of the third extension portion and the fourth extension portion and fastened to an inner end of the third rotary shaft portion.   
     
     
         9 . An antenna device, comprising:
 an antenna assembly;   a lower link unit pivotally coupling a lower portion of the antenna assembly to a support pole to allow vertical rotation; and   a tilt drive unit connecting an upper portion of the antenna assembly to the support pole to enable tilt by rotating the upper portion about a pivot axis defined by the lower link unit,   wherein the antenna device further comprises:   an upper mounting bracket affixed to the upper portion of the antenna assembly and including first coupling portions protruding toward the support pole; and   an upper mounting clamp affixed to an upper portion of the support pole and including second coupling portions protruding toward the antenna assembly,   wherein a lower portion of the first tilt arm is pivotally connected to the first coupling portions, and an upper portion of the first tilt arm is attached to rotary shafts of the first worm wheel, and   wherein a lower portion of the second tilt arm is pivotally connected to the second coupling portions, and an upper portion of the second tilt arm is attached to the rotary shafts of the second worm wheel.   
     
     
         10 . The antenna device of  claim 9 , wherein the tilt drive unit comprises:
 a tilt motor;   a worm gear driven by the tilt motor; and   a first tilt arm attached to the antenna assembly.   
     
     
         11 . The antenna device of  claim 10 , wherein the tilt drive unit further comprises:
 a second tilt arm connected to the support pole;   a first worm wheel rotating the first tilt arm via the worm gear; and   a second worm wheel rotating the second tilt arm via the worm gear.   
     
     
         12 . The antenna device of  claim 9 , further comprising:
 a radio unit coupled to the antenna assembly, positioned within an internal space delineated by the support pole, the antenna assembly, the lower link unit, and the tilt drive unit.   
     
     
         13 . The antenna device of  claim 10 , wherein:
 the first coupling portions are configured as a spaced pair in a transverse direction of the antenna assembly; and the second coupling portions are configured as a spaced pair in a traverse direction of the antenna assembly.